upstream default_backend_traefik {
    server {{ node21 }}:81    max_fails=3 fail_timeout=10s;
    server {{ node22 }}:81    max_fails=3 fail_timeout=10s;
}
server {
    server_name *.od.com;

    location / {
        proxy_pass http://default_backend_traefik;
        proxy_set_header Host       $http_host;
        proxy_set_header x-forwarded-for $proxy_add_x_forwarded_for;
    }
}
